Hydroxyalkylaminopyrimidyl dibenzanthrones



United States Patent 3,108,105 HYDROXYALKYLAMINOPYRIMIDYL DIBENZANTHRONES Max Staeuble, Basel, Switzerland, assignor to Ciba Limited, Basel, Switzerland, a company of Switzerland No Drawing. Filed Mar. 13, 1961, Ser. No. 95,025 Claims priority, application Switzerland Mar. 15, 1960 4 Claims. (Cl. 260-25643) This invention provides valuable new anthraquinone vat dyestuffs corresponding to the general formula X( (IJX N\ /CX C/ X in which at least one X represents the radical of a vat dyestufi bound through a bridge, preferably an -NH- bridge, to the pyrimidine ring, and every remaining X represents a hydrogen atom or an alkyl, aryl, nitro or advantageously amino group which may be substituted.

The invention also provides a process for the manufacture of the above new dyestuffs, wherein a vat dyestutf, or an intermediate product convertible into a vat dyestufl by acylation, which contains at least one acylatable amino group, is condensed with a pyrimidine derivative of the general formula in which at least two Ys represent halogen atoms and every remaining Y represents a hydrogen atom or a substituent, and every mobile halogen atom remaimng 1n the resulting primary condensation product is exchanged for T ical, for example, by halogen atoms or methoxy, alkyl,

trifluorornethyl, sulfonamide or alkylsulfone groups.

There may also be mentioned 1:4-diarnino-2-acetylanthraquinone and l:4-diamino-2-benzoylanthraquinone, in which under normal conditions only the amino group in the 4-position can be acylated. There may also be mentioned aminoanthraquinones that further contain fusedon carbocyclic or heterocyclic rings, for example:

1 4-aminoanthraquinone-2: 1 (N) -acridone,

S-amino-l :9-isothiazole-anthrone,

3,108,105 Patented Oct. 22, 1963 4- or S-aminoanthrapyrimidine,

Mono-aminoacedianthrones,

4- or 5-amino-l:1'-dianthrimide-carbazole,

4- or 5-amino-5-benzoylamino-dianthrimide-carbazole, or

4-arnino-4-benzoylamino-dianthrimide-carbazole,

4-arnino-anthrapyridones,

Aminodibenzanthrone, aminoisodibenzanthrone, aminodibenzpyrene-quinone, aminoanthanthrone, aminobenzanthrone and aminoflavanthrone.

As pyrimidine derivatives of the formula (2) there may be mentioned:

2 4: 6-trichloropyrimidine,

2 :4 6-tribromopyrimidine,

2:4: 5 -tetrachloropyrimidine,

4-dichloro-6-methylpyrimidine, -dichloro-5-nitropyrimidine, -dichloro-5-nitro-6-methylpyrimidine,

6-trichl0ro-5-nitropyrimidine, -dichloropyrimidinel-carboxylic acid chloride, and 6-dichloropyrimidine-i-sulfonic acid chloride.

pylamine or butylamine, and more especially a hydroxyalkylamine, such as fl-hydroxyethyl-amine, di-(hydroxyethyl)-amine, 'y-hydroxypropylamine or an alkoxyalkylamine such as fi-methoxyethylamine, or a halogen-alkylamine such as 8-chlorethylamine, or a cycloalkylamine such as cyclohexylamine.

The reactions are advantageously carried out in an inert organic solvent, for example, nitrobenzene, chlorobenzene, ortho-dichlorobenzene or dirnethylformamide, at .an elevated temperature. In general, it'is not necessary to isolate the halogenated primary condensation product, and it is of advantage to carry out both reactions in the same vessel.

The dyestuffs of the invention can be used, for example, as pigments, for coloring a wide variety of materials, and more especially for dyeing or printing textile materials of natural or regenerated cellulose by the conventional vat dyeing or printing methods.

The following examples illustrate the invention, the

parts and percentages being by weight unless otherwise stated, and the relationship of parts by weight to parts by volume being the same as that of the kilogram to the liter:

Example 1 9.4 parts of aminodibenzanthrone are suspended while stirring, in 200 parts of dry nitrobenzene and the whole is heated to to C. A solution of 6 parts of 2:425 :6-tetrachloropyrimidine in 50 parts of nitrobenzene is then added, followed by the addition of0n5 part of pyridine, whereupon the mixture is stirred on for 20 hours at 170 C. and then cooled to room temperature.

The resulting condensation product of the probable formula is then filtered oh? and washed successively with nitrobenzene and acetone. The filter cake is stirred in small portions at 150 to 160 C. into 100 parts of monoethanolamine and the mixture is refluxed for 2 hours, allowed to cool, poured into water and the dyestulf of the probable formula is filtered off, washed successively with water and acetone, and dried in vacuo at 60 to 70 C.

When dry, the new dyestufif forms a black powder which dyes cotton and regenerated cellulose from an alkaline hydrosulfite vat valuable black shades having excellent properties of fastness.

Example 2 9.4 parts of aminodibenzanthrone are suspended with stirring in 200 parts of dry nitrobenzene and the whole is heated to 160 to 170 C. A solution of 5.5 parts of 2:4:6-trichloropyrimidine in 40 parts of nitrobenzene is then added, the mixture is treated with 0.5 part of pyridine, stirred on for 20 hours at 190 C. and then cooled 4 to room temperature. The resulting condensation product of the probable formula is filtered off and washed with nitrobenzene and then with acetone. The filter cake is cautiously stirred in small portions at to C. into 100 parts of diethanolarnine and the mixture is stirred on for 2 hours at 170 to C. The reaction mixture is then poured over 1000 parts of ice, and the dyestuff of the probable formula.

and 2:4:6-tn'chloropyrimidine described in the first paragraph of Example 2 is cautiously stirred into 100 parts of boiling ethanol'amine and the mixture is refluxed for 1 hours. The dyestufi of the probable formula is isolated as described in Example 2. 'It dyes cotton and regenerated cellulose black shades of excellent fastness properties.

Example 4 5.0 parts of the condensation product firom aminodibenzanthrone and 2:4:5Z6-tetraohloropynimidine prepared as described in Example 1 are heated in 80 parts of dimethyl formarnide and 20 parts of 2-amino-2-methyl- 1:3-propanediol for hours at 190 C. in an autoclave equipped with a stirrer; the mixture is then poured into water and the dyestufi is filtered off and dried. This new dyestutf of the probable formula dyes cotton and regenerated cellulose from a blue-violet hydrosulfite vat black shades having very good fastness properties.

Dyestuffs that have equally good properties are obtained by replacing in this example 2-amino-2-methyl- 1:3-propanediol by an equal amount of Z-aminobutanol or Z-amino-Z-methylpropanol or tri-(hydroxymethyID- aminornethane.

Example 5 A mixture of parts of aminoacedianthrone, 250 parts of nitrobenzene, 15 parts of 214:5:6-tetrachloropyrimidine and 1 part of pyridine is heated with stirring for 9 hours at 170 to 175 C. and then allowed to cool. The condensation product is filtered off, washed with nitrobenzene and thoroughly expressed. The filter cake is stirred into parts ofcyclohexylamine and the mixture is refluxed for 2 hours and allowed to cool. The excess amine is then expelled with steam and the dyestuff is filtered oh and dried. This dyestuif of the probable formula dyes cotton and regenerated cellulose from an alkaline hydrosulfite vat very fast brown shades.

When in this example cyclohexylamine is replaced by an equal amount of aniline and the mixture is heated for 2 hours at C., a dyestufi of similar properties is obtained.

Example 6 0.8 part of the dystufi obtained as described in Example 1 in 100 parts of water is vatted in the presence of 6 parts by volume of sodium hydroxide solution of 30% strength with 2.4 parts of sodium hydrosulfite at 50 to 60 C. The stock vat thus prepared is added to a solution of 6 parts by volume of sodium hydroxide solution of 30% strength and 0.8 part of sodium hydrosulfite in 300 parts of water. 10 parts of cotton satin are dyed in the resulting dyebath for 1 hour at 60 to 80 C. with the addition of 12 parts of sodium chloride. The cotton is then squeezed, oxidized in air, rinsed, acidified, again rinsed and soaped at the boil. A strong black dyeing id obtained which has very good properties of fastness.

What is claimed is:

1. A compound of the formula in which two Xs represent lower hydroxyalkylamino groups and the third X represents a member selected from the group consisting of hydrogen and lower hydroxyalkylamino.

7 1 8 2. The dyestuif of the formula 4. The dyestufi of the .formula 3. The dyestufi of the formula 25 References Cited in the file of this patent UNITED STATES PATENTS 1,888,631 Kunz et a1 Nov. 22, 1932 FOREIGN PATENTS 91,206 Norway Jan. 18, 1958 CH2OH2-OH I /C-H CH2CH2--OH C CHr-OHr-OH 35 CH2CHa--OH 

1. A COMPOUND OF THE FORMULA 